Ball seat



Patented- Mar. 17, 1925.

UNITED STATES: PATENT' 0l.-HCEA DELBERT F. AXELSON, OF LOS ANGELES, CALIFORNIA, ASSIG-NOR T v.LX-11.116011' CHENE COMPANY, A CORPORATION OF'CALIFORNIA.

Bann SEAT.

Application iiled May 11, 1922. Serial No. 560,179.

To all whom t may concern."

Be it known that I, DELBERT F. AxnLsoN,

a. citizen of the United States, residing at Los Angeles .'in the county of- Los Angeles and State of California, have '.inv'ented a.

new and useful Ball Seat, of which the-following is a specification.

My invention relates to oil Well-pumps and i particularly to the ball valve and sea't which vent-ion. l

Fi 2 isa section on a plane indicated by the l1ne 2-2 of Fig. 1, this view being on a reduced scale as compared to Fig. 1.

a ball -cagehaving a shoulder 11 adjacent to an opening which is provided with a thread 12. Seating on the shoulder 11 is a ball seat V15 which is made symmetrical on either side 3,0 of rai plane indicatedby the line 3-3 of Fig.

1 and which is also symmetrical around an axis indicated by the linea-4 of Fig. 1.

The object of making the member 15 symmetrical on either side of the plane 3--3 is to 36 make it reversible, thus giving double w ar.

The ball seat 15 consists of a body 20 having a central opening 21 therein. A flange 22. is provided which seats upon the shoulder 11, being held thereon by means of: a thread- 40 ed member 23. Immediately adjacent to the opening 21 and on either side thereof are ball seats 3() which are spherical in their outline having the same radius as a ball 31 which seats in the upper seat as shown in Fig. 1. Above and below the seats 30 are conical surfaces 32.

The conical surfaces 32 are the principal point of novelty in the invention. In the present formo'f valve seat now in common use. throughout the world, the top of the seat is made flat along a plane indicated bythe line P--P in Fig. 1. That is, the top erred embodiment of one form of my in-` In the form of the invention shown, 10 is of the seat is made fiat, forming a sharp corner at the point of intersection of the spherical seat and this fiat top. The ball in falling in the' present form of construction v strikes against the thin edge of the corner thus battering it out of shape and distorting the spherical surface so that fluid leaks the ball after it is seated.

past

In the forni of construction shown in the drawing the cone is tangential to the sphericalseat and no corner is formed therebetween. The Iball in falling is` accurately guided to its seat, due to the guiding action of the cone. In practice a high degree ofaccuracy as to the tangency of the cone to the spherical seat is not found necessary.

lThe walls of the openings 32 diverge nearly to the periphery of the seat 15 at the ends of said seat, so that vthe ball 31, when elevated above said seat, may engage the inside of the cage, whereby the ball is prevented fr'om pounding against either of said ends when uppermost, as dotted lines in Fig. 1.

illustrated in I claim as my invention:

In a deep well oil pump, the combination with a. ball cage and a' threaded member in threaded engagement with said cage, said cage being formed With an internal shoulder` of: a valve seat fitting within said cage and said threaded member and formed with an external fiange held against said shoulder by the lengagement of said threaded member with said flange, said valve .seat being .'formed with a vertical opening therein intermediate lits ends; a ball seat at the upper edge and a ball sea-t at thel lower edge'of said lopening, therebeing conical openings in said seat fitting communicating with, and diverging from, said intermediate opening, and disposed tangentially to said seats: and a ball adapted to rest upon one of said ball seats when one of said seats is in its uppermost position, and to be guided onto saidseat by the wallof the conical opening con-. -verging to the seat, each of said seats having a radius of curvature equal to thatv of said ball.

' IIL testimony whereof, I have hereunto set 5th day of my hand at Los Angeles, California, this May, 1922.

DELBERT F. .AXE7 LSON. 

